In each question below, a sentence is given, divided into five parts (1, 2, 3, 4, 5) which when rearranged will form a logical and coherent sentence. One of the parts does not belong to the sentence. Identify the part that does not belong and rearrange the remaining parts to form a meaningful sentence. Choose the correct arrangement.  1. suggesting that the structural intricacies of our mother tongue inherently constrain and shape our cognitive boundaries   ​2. asserting that human perception of reality is intrinsically modulated by the specific vocabulary and grammatical constructs available to us   ​3. the rapid expansion of desertification threatens the precarious agricultural economies of sub-Saharan nations   ​4. fundamentally challenging the long-held assumption that thought processes are completely independent of verbal expression   ​5. the linguistic relativity hypothesis postulates a profound interconnectedness between language and foundational psychological frameworks